You probably have heard the Christian doctrine of the Trinity described as follows. "That God is one God, but three coeternal consubstantial persons or hypostases the Father, the Son, and the Holy Ghost (or Holy Spirit) as one God in three Divine persons. The three persons are distinct, yet are of one substance, essence, or nature." If descriptions of the Trinity confuse you, you are not alone. It confuses the best scholars and theologians, which is probably why their Trinity descriptions normally include so much philosophical jargon, resulting in no greater clarity into the matter. This lack of clarity has unfortunately sometimes led to differing views and to nontrinitarian beliefs. Trinitarianism contrasts with positions such as Binitarianism (one deity in two persons) and Monarchianism (no plurality of persons within God), of which Modalistic Monarchianism (one deity revealed in three modes) and Unitarianism (one deity in one person) are subsets. Generally speaking, Monarchianism believe that God switches between three different modes, as opposed to the Trinity which has the Father, Son, and Holy Ghost coexisting simultaneously. The Trinity Time Domains view incorporates the doctrine of the Trinity with the understanding of time as defined by dictionaries.
While the doctrine of the Trinity is not explicitly mentioned in the Holy Bible by using the word Trinity, the concept of the Trinity is described many times in the Bible including inferences of it in the Old Testament. God is described as a trinity in Isaiah 9:6, Matthew 1:23; 28:18. John 1:1, 14; 5:22-23; 8:58; 10:30; 14:9; 20:28, 1 John 5:7, and 1 Timothy 3:16.
There is only one true God as described in the Bible in Deuteronomy 4:35, 39; 6:4; 32:39, 2 Samuel 7:22, 1 Kings 8:60, 2 Kings 5:15; 19:15, 1 Chronicles 17:20, Nehemiah 9:6, Psalm 18:31; 86:10, Isaiah 37:16, 20; 43:10, 11; 44:6, 8; 45:21; 46:9, Hosea 13:4, Joel 2:27, Zechariah 14:9, Mark 12:29-34, John 17:3, Romans 3:30, 1 Corinthians 8:4-6, Galatians 3:20, Ephesians 4:6, 1 Timothy 1:17; 2:5, and James 2:19.